drm/amd/display: use pre-allocated temp structure for bounding box

[ Upstream commit afe9555 ] This mirrors what the driver does for older DCN generations. Should fix: BUG: sleeping function called from invalid context at include/linux/sched/mm.h:306 in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 449, name: kworker/u64:8 preempt_count: 2, expected: 0 RCU nest depth: 0, expected: 0 Preemption disabled at: ffffffffc0ce1580>] dc_fpu_begin+0x30/0xd0 [amdgpu] CPU: 5 PID: 449 Comm: kworker/u64:8 Tainted: G W 6.8.0+ torvalds#35 Hardware name: System manufacturer System Product Name/ROG STRIX X570-E GAMING WIFI II, BIOS 4204 02/24/2022 Workqueue: events_unbound async_run_entry_fn v2: drop extra memcpy Fixes: 88c6182 ("drm/amd/display: dynamically allocate dml2_configuration_options structures") Reviewed-by: Harry Wentland <[email protected]> Tested-by: George Zhang <[email protected]> (v1) Suggested-by: Hamza Mahfooz <[email protected]> Signed-off-by: Alex Deucher <[email protected]> Cc: George Zhang <[email protected]> Cc: Arnd Bergmann <[email protected]> Cc: [email protected] Cc: [email protected] Cc: [email protected] Signed-off-by: Sasha Levin <[email protected]>
kraj · Aug 3, 2024 · 23f5e18 · 23f5e18
1 parent 898d200
commit 23f5e18
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Showing 3 changed files with 5 additions and 12 deletions.
diff --git a/drivers/gpu/drm/amd/display/dc/dc.h b/drivers/gpu/drm/amd/display/dc/dc.h
@@ -1392,6 +1392,7 @@ struct dc {
 	} scratch;
 
 	struct dml2_configuration_options dml2_options;
+	struct dml2_configuration_options dml2_tmp;
 	enum dc_acpi_cm_power_state power_state;
 
 };

diff --git a/drivers/gpu/drm/amd/display/dc/resource/dcn32/dcn32_resource.c b/drivers/gpu/drm/amd/display/dc/resource/dcn32/dcn32_resource.c
@@ -2006,11 +2006,9 @@ void dcn32_calculate_wm_and_dlg(struct dc *dc, struct dc_state *context,
 
 static void dcn32_update_bw_bounding_box(struct dc *dc, struct clk_bw_params *bw_params)
 {
-	struct dml2_configuration_options *dml2_opt;
+	struct dml2_configuration_options *dml2_opt = &dc->dml2_tmp;
 
-	dml2_opt = kmemdup(&dc->dml2_options, sizeof(dc->dml2_options), GFP_KERNEL);
-	if (!dml2_opt)
-		return;
+	memcpy(dml2_opt, &dc->dml2_options, sizeof(dc->dml2_options));
 
 	DC_FP_START();
 
@@ -2025,8 +2023,6 @@ static void dcn32_update_bw_bounding_box(struct dc *dc, struct clk_bw_params *bw
 		dml2_reinit(dc, dml2_opt, &dc->current_state->bw_ctx.dml2_dc_power_source);
 
 	DC_FP_END();
-
-	kfree(dml2_opt);
 }
 
 static struct resource_funcs dcn32_res_pool_funcs = {

diff --git a/drivers/gpu/drm/amd/display/dc/resource/dcn321/dcn321_resource.c b/drivers/gpu/drm/amd/display/dc/resource/dcn321/dcn321_resource.c
@@ -1581,11 +1581,9 @@ static struct dc_cap_funcs cap_funcs = {
 
 static void dcn321_update_bw_bounding_box(struct dc *dc, struct clk_bw_params *bw_params)
 {
-	struct dml2_configuration_options *dml2_opt;
+	struct dml2_configuration_options *dml2_opt = &dc->dml2_tmp;
 
-	dml2_opt = kmemdup(&dc->dml2_options, sizeof(dc->dml2_options), GFP_KERNEL);
-	if (!dml2_opt)
-		return;
+	memcpy(dml2_opt, &dc->dml2_options, sizeof(dc->dml2_options));
 
 	DC_FP_START();
 
@@ -1600,8 +1598,6 @@ static void dcn321_update_bw_bounding_box(struct dc *dc, struct clk_bw_params *b
 		dml2_reinit(dc, dml2_opt, &dc->current_state->bw_ctx.dml2_dc_power_source);
 
 	DC_FP_END();
-
-	kfree(dml2_opt);
 }
 
 static struct resource_funcs dcn321_res_pool_funcs = {